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Geology of the Comstock lode and the Washoe district, with atlas

Abstract

The field work for this report was begun in April, 1880, and concluded in March, 1881. In the spring of 1880 the Census of the Mineral Industries West of the Rocky Mountains was placed in my charge in addition to my duties as geologist, and occupied much of my time both during the period of field work in the Washoe District and since.

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90° N90° S · 180° W ← longitude → 180° E
Source-reported bounding extent: 39.208847057702286° to 39.344° latitude; -119.69741821289061° to -119.58343505859374° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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BibTeXRIS

George Ferdinand Becker. 1882. Geology of the Comstock lode and the Washoe district, with atlas. https://doi.org/10.3133/m3

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Glacier modeling in support of field observations of mass balance at South Cascade Glacier, Washington, USA

The long-term USGS measurement and reporting of mass balance at South Cascade Glacier was assisted in balance years 2006 and 2007 by a new mass balance model. The model incorporates a temperature-index melt computation and accumulation is modeled from glacier air temperature and gaged precipitation at a remote site. Mass balance modeling was used with glaciological measurements to estimate dates and magnitudes of critical mass balance phenomena. In support of the modeling, a detailed analysis was made of the "glacier cooling effect" that reduces summer air temperature near the ice surface as compared to that predicted on the basis of a spatially uniform temperature lapse rate. The analysis was based on several years of data from measurements of near-surface air temperature on the glacier. The 2006 and 2007 winter balances of South Cascade Glacier, computed with this new, model-augmented methodology, were 2.61 and 3.41 mWE, respectively. The 2006 and 2007 summer balances were -4.20 and -3.63 mWE, respectively, and the 2006 and 2007 net balances were -1.59 and -0.22 mWE. PDF version of a presentation on the mass balance of South Cascade Glacier in Washington state. Presented at the American Geophysical Union Fall Meeting 2010.

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